Rudder retainer



Aug. 25, 1925. 1550,919

R. E. MrrToN RUDDER RETAI NER original Filed Feb. 20, 1925 Patented Aug.25, 1925.

UNTTEU TATE PATENT OFFECE.

ROBERT ELVYN MI'I'TON, OF SALT LAKE CITY, UTAH.

RUDDER RETAINER. I ri.

Application filed February 20, 1923, Serial No. 620,229. Renwed April S,1925.

T0 all whom t may concem.:

Be it known that I, ROBERT ELVYN MIT- TON, a citizen of the UnitedStates, residing at Salt Lake City, in the county of Salt Lake and Stateof Utah, have invented a new and useful Improveinent in RudderRetainers, of which the following is a specification.

This invention relates to an improvement in the rudder' bar for thecontrol of the rudder on aeroplanes.

One of the objects is to provide a rudder bar for aeroplanes that willstay in the position putby the pilotls feet after the feet have beenremoved, thus holding the rudder in the desired position wanted withoutthe aid of the pilot.

Another object is to provide a rudder bar for aeroplanes that can beused as the ordinary rudder bar when desired to be.

VVith these and other objects in view my invention consists of thefollowing construction of parts.

Referring to the drawings:

Figure 1 is a plan view of my inventlon showing the rudder bar broken.

Fig. 2 is a cross section view of the pedestal and cap.

Fig. 3 is a plan view of the pedestal.

Fig. 4 is a plan view of the rudder bar, rudder and wire connectons.

L denotes the rudder bar, 1 the shaft passing through the rudder bar Land the cap 2 on the pedestal 3. The inner end of the shaft 1 has a head4 thereon. A spring 5 is placed over said stem and within said pedestal./Vithin the cap 2 is placed a square hole for receiving the square 6 onthe shaft 1. On the shaft 1 is placed another spring 7 which is locatedabove the cap 2 and under the rudder bar L. The rudder bar is secured tothe shaft 1 by means of the nut 8. The tension of the Springs is alsoControlled by this nut.

Located on the side of the pedestal are two lugs 9' in which is swiveleda lifting .lever 9 which is held in the downward stroke by catching onthe lug 11 located on the anchor rod 12. The pedestal and anchor rod aresecured to the aeroplane fioor 13.

The upper face 15 of the pedestal 3 and the under face 16 of the cap 2are notched to interlock each other thus holding them in the lockedpositi-on so placed by the pilot.

In the operation of my invention after it has been placed on the floorof the aeroplane and secured thereto, the wires 16 and 17 are attachedand connected to the rudder 19 as shown in Fig. 4.

After the invention has been placed together as described, the nut 8 hasbeen tightened on the shaft 1 and the required tension has been securedto the Springs 5 and 7. Now as shown the device will automatically lockitself to the pedestal and will be held within the notches 15interlocking with the notches 16. If the pilot should move his rightfoot it would move the rudder bar to the right forward position and assoon as the foot was removed from the rudder bar it would remain in theposition pushed b-y the pilots foot. And if the left foot pushed on therudder bar it would be moved to the left forward position.

In the event that the pilot wished to use the rudder bar with his feetand free from the looking movement, lever 9 is moved downward and placedunder the lug 11 on the anchor bar 12 as shown by dotted lines.

This movement will raise the cap 2 free from the notches and thepedestal thus leaving the rudder bar free to move at will.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is;

1. A rudder retainer for aeroplanes' of the character described,comprising a rudder bar, a pedestal having a cap thereon, an adjustableshaft within said pedestal, a lever attached to said pedestal, one endof said lever resting under said shaft within said pedestal, Springs onsaid shaft for holding said cap to said pedestal, one of said Springswithin said pedestal, and the other of said Springs resting' on said capand under said rudder bar, means on said shaft for securing said capthereto so that said cap will turn with said shaft, means for lookingand unlocking said cap to said pedestal, means for securing said rudderbar to said shaft and means for Operating said rudder from said rudderbar.

2. A rudder retainer for aeroplanes of the character described,comprising a rudder bar, a shaft, a pedestal and a cap for saidpedestal, the upper face of said pedestal and the under face of said caphaving notches thereon, said notches to interlock with each other, saidrudder bar mounted on said shaft, said shaft secured within said shaftto unlock said Cap from said pedestal, means for holding said lever inan nnlocked position, means for seouring said rudder 10 bar to saidshaft and means for Operating the rudder from said rudder bar.

In Witness Whereof I afix my signature.

ROBERT ELVYN MITTON.

